MAI]SrE STATE SOCIETY. £9 



Prottty & Mears, Boston, No. 155, Greensward Plow. 



This plow has many excellent qualities, but the mold-board is 

 rather too concave, and pressing hard against the sod in inverting 

 it, is hard to hold. The plow cuts under the edge of the sod, so as 

 to leave the cut edge of the unplowed land inclining or leaning 

 toward the furrow at an angle of about 15 degress from the perpen- 

 dicular. Consequently when this sod is next turned over, it wedges 

 down closely against the previous sod, lies flat and the line of grass 

 is completely covered. The slice cut by this plow was 8 by 16 

 inches. 





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View of the movement of the furrow 



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slice. 



